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1
18 package org.enhydra.convert.xml;
19
20 import java.io.File  ;
22 import java.io.FileReader ;
23 import java.io.FileWriter ;
24 import java.io.InputStream ;
25 import java.io.InputStreamReader ;
26 import java.io.IOException ;
27 import java.io.OutputStream ;
28 import java.io.OutputStreamWriter ;
29 import java.io.Reader ;
30 import java.io.Writer ;
31 import java.util.HashMap ;
32 import java.util.Iterator ;
33 import java.util.Map ;
34 import org.xml.sax.EntityResolver ;
35 import org.xml.sax.ErrorHandler ;
36 import org.xml.sax.InputSource ;
37 import org.xml.sax.Locator ;
38 import org.xml.sax.SAXException ;
39 import org.xml.sax.SAXParseException ;
40 import org.xml.sax.XMLReader ;
41 import org.xml.sax.ext.LexicalHandler ;
42 import org.xml.sax.helpers.DefaultHandler ;
43 import org.xml.sax.helpers.XMLReaderFactory ;
44
45 public class LocalImpl extends DefaultHandler implements Cloneable , Unmarshallable, LexicalHandler , Local {
46
47 private String value;
48 private boolean zeus_ValueSet;
49 private String id;
50 private boolean zeus_IdSet;
51
52
53 private String docTypeString;
54
55
56 private String outputEncoding;
57
58
59 private Unmarshallable zeus_currentUNode;
60
61
62 private Unmarshallable zeus_parentUNode;
63
64
65 private boolean zeus_thisNodeHandled = false;
66
67
68 private boolean hasDTD;
69
70
71 private boolean validate;
72
73
74 private Map namespaceMappings;
75
76
77 private static EntityResolver entityResolver;
78
79
80 private static ErrorHandler errorHandler;
81
82 private static LocalImpl prototype = null;
83
84 public static void setPrototype(LocalImpl prototype) {
85 LocalImpl.prototype = prototype;
86 }
87 public static LocalImpl newInstance() {
88 try {
89 return (prototype!=null)?(LocalImpl)prototype.clone(): new LocalImpl();
90 } catch (CloneNotSupportedException e) {
91 return null; }
93 }
94 public LocalImpl() {
95 zeus_ValueSet = false;
96 zeus_IdSet = false;
97 docTypeString = "";
98 hasDTD = false;
99 validate = false;
100 namespaceMappings = new HashMap ();
101 }
102
103 public String getValue() {
104 return value;
105 }
106
107 public void setValue(String value) {
108 this.value = value;
109 zeus_ValueSet = true;
110 }
111
112 public String getId() {
113 return id;
114 }
115
116 public void setId(String id) {
117 this.id = id;
118 zeus_IdSet = true;
119 }
120
121 public void setDocType(String name, String publicID, String systemID) {
122 try {
123 startDTD(name, publicID, systemID);
124 } catch (SAXException neverHappens) { }
125 }
126
127 public void setOutputEncoding(String outputEncoding) {
128 this.outputEncoding = outputEncoding;
129 }
130
131 public void marshal(File file) throws IOException {
132 marshal(new FileWriter (file));
134 }
135
136 public void marshal(OutputStream outputStream) throws IOException {
137 marshal(new OutputStreamWriter (outputStream));
139 }
140
141 public void marshal(Writer writer) throws IOException {
142 writer.write("<?xml version=\"1.0\" ");
144 if (outputEncoding != null) {
145 writer.write("encoding=\"");
146 writer.write(outputEncoding);
147 writer.write("\"?>\n\n");
148
149 } else {
150 writer.write("encoding=\"UTF-8\"?>\n\n");
151
152 }
153 writer.write(docTypeString);
155 writer.write("\n");
156 writeXMLRepresentation(writer, "");
158
159 writer.flush();
161 writer.close();
162 }
163
164 protected void writeXMLRepresentation(Writer writer,
165 String indent)
166 throws IOException {
167
168 writer.write(indent);
169 writer.write("<local");
170
171 for (Iterator i = namespaceMappings.keySet().iterator(); i.hasNext(); ) {
173 String prefix = (String )i.next();
174 String uri = (String )namespaceMappings.get(prefix);
175 writer.write(" xmlns");
176 if (!prefix.trim().equals("")) {
177 writer.write(":");
178 writer.write(prefix);
179 }
180 writer.write("=\"");
181 writer.write(uri);
182 writer.write("\"\n ");
183 }
184
185 if (zeus_IdSet) {
187 writer.write(" id=\"");
188 writer.write(escapeAttributeValue(id));
189 writer.write("\"");
190 }
191 if (getValue() != null) {
192 writer.write(">");
194 writer.write(escapeTextValue(getValue()));
195 writer.write("</local>\n");
196 } else {
197 writer.write("/>\n");
198 }
199 }
200
201 private String escapeAttributeValue(String attributeValue) {
202 String returnValue = attributeValue;
203 for (int i = 0; i < returnValue.length(); i++) {
204 char ch = returnValue.charAt(i);
205 if (ch == '"') {
206 returnValue = new StringBuffer ()
207 .append(returnValue.substring(0, i))
208 .append(""")
209 .append(returnValue.substring(i+1))
210 .toString();
211 }
212 }
213 return returnValue;
214 }
215
216 private String escapeTextValue(String textValue) {
217 String returnValue = textValue;
218 for (int i = 0; i < returnValue.length(); i++) {
219 char ch = returnValue.charAt(i);
220 if (ch == '<') {
221 returnValue = new StringBuffer ()
222 .append(returnValue.substring(0, i))
223 .append("<")
224 .append(returnValue.substring(i+1))
225 .toString();
226 } else if (ch == '>') {
227 returnValue = new StringBuffer ()
228 .append(returnValue.substring(0, i))
229 .append(">")
230 .append(returnValue.substring(i+1))
231 .toString();
232 }
233 }
234 return returnValue;
235 }
236
237
244 public static void setEntityResolver(EntityResolver resolver) {
245 entityResolver = resolver;
246 }
247
248
255 public static void setErrorHandler(ErrorHandler handler) {
256 errorHandler = handler;
257 }
258
259 public static Local unmarshal(File file) throws IOException {
260 return unmarshal(new FileReader (file));
262 }
263
264 public static Local unmarshal(File file, boolean validate) throws IOException {
265 return unmarshal(new FileReader (file), validate);
267 }
268
269 public static Local unmarshal(InputStream inputStream) throws IOException {
270 return unmarshal(new InputStreamReader (inputStream));
272 }
273
274 public static Local unmarshal(InputStream inputStream, boolean validate) throws IOException {
275 return unmarshal(new InputStreamReader (inputStream), validate);
277 }
278
279 public static Local unmarshal(Reader reader) throws IOException {
280 return unmarshal(reader, false);
282 }
283
284 public static Local unmarshal(Reader reader, boolean validate) throws IOException {
285 LocalImpl local = LocalImpl.newInstance();
286 local.setValidating(validate);
287 local.setCurrentUNode(local);
288 local.setParentUNode(null);
289 XMLReader parser = null;
291 String parserClass = System.getProperty("org.xml.sax.driver",
292 "org.apache.xerces.parsers.SAXParser");
293 try {
294 parser = XMLReaderFactory.createXMLReader(parserClass);
295
296 if (entityResolver != null) {
298 parser.setEntityResolver(entityResolver);
299 }
300
301 parser.setErrorHandler(local);
303
304 parser.setProperty("http://xml.org/sax/properties/lexical-handler", local);
306
307 parser.setContentHandler(local);
309 } catch (SAXException e) {
310 throw new IOException ("Could not load XML parser: " +
311 e.getMessage());
312 }
313
314 InputSource inputSource = new InputSource (reader);
315 try {
316 parser.setFeature("http://xml.org/sax/features/validation", new Boolean (validate).booleanValue());
317 parser.setFeature("http://xml.org/sax/features/namespaces", true);
318 parser.setFeature("http://xml.org/sax/features/namespace-prefixes", false);
319 parser.parse(inputSource);
320 } catch (SAXException e) {
321 throw new IOException ("Error parsing XML document: " +
322 e.getMessage());
323 }
324
325 return local;
327 }
328
329 public Unmarshallable getParentUNode() {
330 return zeus_parentUNode;
331 }
332
333 public void setParentUNode(Unmarshallable parentUNode) {
334 this.zeus_parentUNode = parentUNode;
335 }
336
337 public Unmarshallable getCurrentUNode() {
338 return zeus_currentUNode;
339 }
340
341 public void setCurrentUNode(Unmarshallable currentUNode) {
342 this.zeus_currentUNode = currentUNode;
343 }
344
345 public void setValidating(boolean validate) {
346 this.validate = validate;
347 }
348
349 public void startDocument() throws SAXException {
350 }
352
353 public void setDocumentLocator(Locator locator) {
354 }
356
357 public void startPrefixMapping(String prefix, String uri)
358 throws SAXException {
359 namespaceMappings.put(prefix, uri);
360 }
361
362 public void startElement(String namespaceURI, String localName,
363 String qName, org.xml.sax.Attributes atts)
364 throws SAXException {
365
366 Unmarshallable current = getCurrentUNode();
368 if (current != this) {
369 current.startElement(namespaceURI, localName, qName, atts);
370 return;
371 }
372
373 if ((localName.equals("local")) && (!zeus_thisNodeHandled)) {
375 for (int i=0, len=atts.getLength(); i<len; i++) {
377 String attName= atts.getLocalName(i);
378 String attValue = atts.getValue(i);
379 if (attName.equals("id")) {
380 setId(attValue);
381 }
382 }
383 zeus_thisNodeHandled = true;
384 return;
385 } else {
386 }
388 }
389
390 public void endElement(String namespaceURI, String localName,
391 String qName)
392 throws SAXException {
393
394 Unmarshallable current = getCurrentUNode();
395 if (current != this) {
396 current.endElement(namespaceURI, localName, qName);
397 return;
398 }
399
400 if (this.value == null) {
402 this.value = "";
403 }
404 Unmarshallable parent = getCurrentUNode().getParentUNode();
405 if (parent != null) {
406 parent.setCurrentUNode(parent);
407 }
408 }
409
410 public void characters(char[] ch, int start, int len)
411 throws SAXException {
412
413 Unmarshallable current = getCurrentUNode();
415 if (current != this) {
416 current.characters(ch, start, len);
417 return;
418 }
419
420 String text = new String (ch, start, len);
421 if (this.value == null) {
422 this.value = text;
423 } else {
424 this.value = new StringBuffer (this.value).append(text).toString();
425 }
426 }
427
428 public void comment(char ch[], int start, int len) throws SAXException {
429 }
431
432 public void warning(SAXParseException e) throws SAXException {
433 if (errorHandler != null) {
434 errorHandler.warning(e);
435 }
436 }
437
438 public void error(SAXParseException e) throws SAXException {
439 if ((validate) && (!hasDTD)) {
440 throw new SAXException ("Validation is turned on, but no DTD has been specified in the input XML document. Please supply a DTD through a DOCTYPE reference.");
441 }
442 if (errorHandler != null) {
443 errorHandler.error(e);
444 }
445 }
446
447 public void fatalError(SAXParseException e) throws SAXException {
448 if ((validate) && (!hasDTD)) {
449 throw new SAXException ("Validation is turned on, but no DTD has been specified in the input XML document. Please supply a DTD through a DOCTYPE reference.");
450 }
451 if (errorHandler != null) {
452 errorHandler.fatalError(e);
453 }
454 }
455
456 public void startDTD(String name, String publicID, String systemID)
457 throws SAXException {
458
459 if ((name == null) || (name.equals(""))) {
460 docTypeString = "";
461 return;
462 }
463
464 hasDTD = true;
465 StringBuffer docTypeSB = new StringBuffer ();
466 boolean hasPublic = false;
467
468 docTypeSB.append("<!DOCTYPE ")
469 .append(name);
470
471 if ((publicID != null) && (!publicID.equals(""))) {
472 docTypeSB.append(" PUBLIC \"")
473 .append(publicID)
474 .append("\"");
475 hasPublic = true;
476 }
477
478 if ((systemID != null) && (!systemID.equals(""))) {
479 if (!hasPublic) {
480 docTypeSB.append(" SYSTEM");
481 }
482 docTypeSB.append(" \"")
483 .append(systemID)
484 .append("\"");
485
486 }
487
488 docTypeSB.append(">");
489
490 docTypeString = docTypeSB.toString();
491 }
492
493 public void endDTD() throws SAXException {
494 }
496
497 public void startEntity(String name) throws SAXException {
498 }
500
501 public void endEntity(String name) throws SAXException {
502 }
504
505 public void startCDATA() throws SAXException {
506 }
508
509 public void endCDATA() throws SAXException {
510 }
512
513 }
514 |
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